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The litre (Commonwealth spelling) or liter (American spelling) (SI symbols L and l, [1] other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm 3 ), 1000 cubic centimetres (cm 3 ) or 0.001 cubic metres (m 3 ).
Multivitamins nutrition facts label showing that the international unit of, for example, vitamins D and E correspond to different gram values. In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances.
United States standard drinks of beer, malt liquor, wine, and spirits compared. Each contains about 14 grams or 17.7 ml of ethanol. A standard drink or (in the UK) unit of alcohol is a measure of alcohol consumption representing a fixed amount of pure alcohol.
It was supposed to be replaced by the 500 mL "half-liter", which was dropped in 1989, but is sometimes used for craft beer and malt liquor. Fifth (US) 25.6 US fl oz: 26.66 imp oz. 757 mL: A fifth (1 ⁄ 5, or 0.2) of a US gallon. Called a "Commercial Quart" because it was equivalent to 0.8 US fluid quarts. Replaced by the 750 mL "metric quart".
Water hardness is measured by the milligrams of calcium carbonate per liter of water(mg/L). Soft water: 0-60 mg/L. Moderately hard water: 61-120 mg/L. Hard water: 121-180 mg/L.
The half-liter water bottle (16.9 fl oz) has nearly replaced the 16 ounce size, while 700 mL (23.6 fl oz) and one-liter sizes are also common, though 20 fl oz and 24 fl oz sizes remain popular, particularly in vending machines.
In the metric system, a microgram or microgramme is a unit of mass equal to one millionth (1 × 10 −6) of a gram.The unit symbol is μg according to the International System of Units (SI); the recommended symbol in the United States and United Kingdom when communicating medical information is mcg.
Therefore, it is common to equate 1 kilogram of water with 1 L of water. Consequently, 1 ppm corresponds to 1 mg/L and 1 ppb corresponds to 1 μg/L. Similarly, parts-per notation is used also in physics and engineering to express the value of various proportional phenomena.